KR102262639B1 - Electronic apparatus in wireless communications system, and mobility measurement method - Google Patents

Abstract

The present disclosure relates to an electronic device and a method for measuring mobility in a wireless communication system. The electronic apparatus includes a communication device and a mobility measurement device. The communication device is configured to separately perform dual connectivity communication with the two access nodes via different carriers. The mobility measurement device is configured to perform mobility measurement to determine a connection switching mode on an access node in dual connectivity when a connection quality of service of at least one of the current dual connectivity nodes is lower than a preset level. The mobility measurement device is further configured to determine a reporting mode of a mobility measurement result according to a measurement condition of at least one of the current dual access nodes.

Description

Electronic device of a wireless communication system, and a mobility measurement method {ELECTRONIC APPARATUS IN WIRELESS COMMUNICATIONS SYSTEM, AND MOBILITY MEASUREMENT METHOD}

The present disclosure relates to the field of wireless communication, and more particularly, to an electronic device of a wireless communication system and a method of measuring mobility by a mobile communication terminal.

Currently, the following measurement event is defined in a long-term evolution (LTE)/advanced long-term evolution (LTE-A) system.

A1 event where the serving cell has a quality higher than the absolute threshold to turn off ongoing inter-frequency measurements and disable measurement gaps.

A2 event where the serving cell has a quality below the absolute threshold to turn on the inter-frequency measurement and activate the measurement gap.

A3 event in which the neighboring cell has a quality higher than the quality of the main serving cell by an amount greater than the absolute threshold for coverage-based inter-/in-frequency handover.

A4 events where neighboring cells have higher quality than absolute threshold, mainly for load-based handover.

A5 event in which the primary serving cell has a quality lower than the first absolute threshold 1 and the neighboring cell has a quality higher than the second absolute threshold 2 for coverage-based inter-/in-frequency handover.

A6 event in which the neighboring cell has a quality higher than that of the secondary serving cell by an amount above the absolute threshold for coverage-based inter-frequency secondary carrier coordination.

B1 event where neighboring cells in different systems have higher quality than absolute threshold for load based handover.

B2 event in which the serving cell has a quality lower than the first absolute threshold 1 for coverage-based handover, and the neighboring cell of the other system has a quality higher than the second absolute threshold 2.

The A1/A2 event can be used to turn off or trigger an inter-frequency measurement by the terminal. A3/A5/B2 events can be used for coverage-based inter-system/intra-system handover. The A6 event may be used for coverage-based secondary carrier coordination in carrier aggregation scenarios. A4/B1 events can be used for load-based inter-system/intra-system handover.

Summary of the invention

In a scenario of dual connectivity, a terminal is simultaneously connected to two base stations that do not have an ideal backhaul, and this mobility scenario is more complex than a single base station connection or a dual base station connection with an ideal backhaul carrier aggregation. Accordingly, embodiments of the present disclosure are provided for the dual connectivity scenario.

A brief summary of embodiments of the disclosure is provided below to provide some basic understanding of some aspects of the disclosure. It is to be understood that the summary is not exhaustive and is not intended to identify key or critical portions of the disclosure or to limit the scope of the disclosure. Its sole purpose is to present some concepts in a simplified manner as a prelude to the more detailed description that is presented later.

According to one aspect of the present invention, an electronic device of a wireless communication system is provided. The electronic apparatus includes a communication device and a mobility measurement device. The communication device is configured to perform dual connectivity communication with the two access nodes through different carriers, respectively. The mobility measurement device is configured to perform mobility measurement on the access node of the current dual connection to determine the connection switching mode when the quality of service of at least one of the current dual connection nodes is lower than a predetermined level. The mobility measurement is further configured to determine a mode for reporting a result of the mobility measurement based on a measurement condition of at least one of the current dual access nodes.

According to another aspect of the present disclosure, a method for performing mobility measurement by a mobile communication terminal is provided. The method includes performing mobility measurements for the current dual access node to determine a connection switching mode when the quality of service of at least one of the current dual access nodes for the mobile communication terminal communicating in the dual connectivity scenario is lower than a predetermined level includes The method also includes determining a mode for reporting a result of the mobility measurement based on a measurement condition of at least one of the current dual connectivity nodes.

Embodiments of the present disclosure are advantageous for improving the efficiency of measurement reporting for dual connectivity.

BRIEF DESCRIPTION OF THE DRAWINGS The present disclosure may be better understood by reference to the following description taken in conjunction with the accompanying drawings. The same or similar reference characters indicate the same or similar parts throughout the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, together with examples, are incorporated herein together with the following specification as part of the description to further illustrate preferred embodiments and to explain the principles and advantages of the present disclosure. In the attached drawing:
1 is a block diagram illustrating a configuration example of an electronic device according to an embodiment of the present disclosure.
2 is a schematic diagram for illustrating a connection switching mode.
3 is a schematic diagram to illustrate an example of a time sequence relationship between a T310 timer and a TTT timer.
4 is a schematic diagram to illustrate an example of a time sequence relationship between TTT timers.
5 is a schematic diagram to illustrate an example of a time sequence relationship between a TTT timer and a T310 timer.
6 is a schematic diagram to illustrate an example of a time sequence relationship between a TTT timer and a T310 timer.
7 is a schematic diagram to illustrate an example of a time sequence relationship between a TTT timer and a T310 timer.
8 is a schematic diagram to illustrate an exemplary manner of signaling transmission for access node switching.
9 is a schematic diagram to illustrate an exemplary manner of signaling transmission for access node switching.
10 is a schematic diagram to illustrate an exemplary manner of signaling transmission for access node switching.
11 is a schematic diagram to illustrate an exemplary manner of signaling transmission for access node switching.
12 is a flowchart of a process example of a method according to another embodiment of the present disclosure;
13 is a block diagram of an exemplary architecture of a computer implementing a method and apparatus according to the present disclosure;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Elements and features described in the accompanying drawings or embodiments may be combined with elements and features illustrated in one or more other accompanying drawings or embodiments in the present disclosure. It should be noted that presentation and description of unrelated components and processes known to those skilled in the art are omitted from the accompanying drawings and description for clarity.

The technology according to the present disclosure can be applied to various products. For example, a base station may be implemented as any type of evolved Node B (eNB), such as a macro eNB or a small eNB. A small eNB may be an eNB that covers a small cell rather than a macro cell, such as a pico eNB, a micro eNB, and a home eNB (femto-eNB). Alternatively, the base station may be implemented as a Node B or any other type of base station, such as a base transceiver station (BTS). A base station may include a body (also referred to as base station equipment) configured to control radio communications and one or more remote radio heads (RRHs) disposed at a different location from the body. In addition, each of the various terminals described later may operate as a base station by temporarily or semi-permanently performing the functions of the base station.

For example, the electronic device may be a mobile terminal (eg, a smartphone, a tablet PC (Personal Computer), a laptop PC, a portable game terminal, a portable/dongle mobile router, or a digital camera device) or a vehicle terminal (eg, a vehicle navigation device). device) can be implemented. The terminal device 300 may be implemented as a terminal (also referred to as a machine-type communication (MTC) terminal) performing machine-to-machine (M2M) communication. Also, the electronic device 100 may be a wireless communication module (eg, an integrated circuit module including a single die) mounted in each of the terminals.

Referring to FIG. 1 , an electronic apparatus 100 of a wireless communication system according to an embodiment of the present disclosure includes a communication device 110 and a mobility measurement device 120 .

The communication device 110 is configured to perform dual connectivity communication with two access nodes through different carriers, respectively.

For example, as shown in FIG. 2 , the electronic device U1 may perform dual access communication with each of the two access nodes M1 and S1 through its communication device.

The mobility measurement device 120 is configured to perform mobility measurement on the access node of the current dual connection to determine the connection switching mode when the quality of service of at least one of the current dual connection nodes is lower than a predetermined level. Further, the mobility measurement device 120 is further configured to determine a mode for reporting a result of the mobility measurement based on a measurement condition of at least one of the current dual connectivity nodes.

In the present disclosure, the term “measurement condition” may include the measurement result itself (reference signal reception power (RSRP) and reference signal reception quality (RSRQ), etc.), and there is a measurement list for each access node. and other measurement conditions such as the status of each started T310 timer and/or TTT timer. As described with reference to a specific embodiment below, the mobility measurement device 120 may determine different modes for reporting the result of the mobility measurement based on the measurement condition, thereby improving the measurement reporting efficiency of dual connectivity. have.

According to an embodiment, the mobility measurement may comprise a mobility measurement configured to determine one of the following connection switching modes.

Mode A: Disconnect from one of the current dual-connected nodes to change from dual-connected state to single-connected state.

Mode B: In order to maintain the dual connection state, it maintains the connection to one of the current dual connection nodes and switches the connection to the other node to the target node.

Mode C: To change from the dual connection state to the single connection state, disconnect from all the current dual connection nodes and switch the connection to the target node.

Mode D: In order to maintain the dual connection state, disconnect from all current dual connection nodes, and switch the connection to two target nodes.

Mode E: Maintains connections to all current dual access nodes, and coordinates the secondary carrier of each access node.

Hereinafter, an example of the connection switching mode will be more intuitively described with reference to FIG. 2 .

The macro base station M2 and the small cell base station S4 and the apparatus U4 in dual connection disconnect from one of the access nodes, for example, the small cell base station S4, and another access node, for example, the macro base station. A connection to (M2) can be maintained. This connection switching mode corresponds to the aforementioned mode A. In another example, mode A may include a case of disconnecting from the macro base station and maintaining the connection with the small cell base station.

The device U3 in double connection with the macro base station M1 and the small cell base station S2 disconnects from one of the access nodes, for example, the small cell base station S2, and transfers the connection to the small cell base station S3. can be switched This connection switching mode corresponds to the aforementioned mode B. In another example, mode B may include switching the connection to the source macro base station to the target macro base station.

The macro base station (M2) and the small cell base station (S5) and the device (U5) in double connection disconnects the connection with the macro base station (M2) and the small cell base station (S5), and switches to the connection to the macro base station (M1). can do. This connection switching mode corresponds to the aforementioned mode C. In another example, mode C may include switching the original dual connectivity to a connection to the target small cell base station.

The macro base station (M3) and the small cell base station (S6) and the device (U2) in double connection with both the macro base station (M3) and the small cell base station (S6) cut off the connection, the macro base station (M2) and the small cell base station It can switch to double connection with (S7). This connection switching mode corresponds to the aforementioned mode D.

In particular, for switching mode A, comparison between target nodes is not necessary. The switching may be triggered, for example, by occurrence of a radio link failure (RLF) on the primary carrier of a single node or the mobility measurement result of RSRP/RSRQ on the primary carrier of a single node is lower than a threshold. In the latter case, the trigger event for mode A may be distinguished from the E-UTRAN A2 event. For example, a trigger event is specifically defined for mode A.

According to an embodiment, the mobility measurement device 120 may be configured to report the mobility measurement result corresponding to the connection switch of the mode A when the quality of service of one of the current dual access nodes is lower than the first threshold level. The first threshold level is not higher than the threshold level for triggering the A2 event.

With respect to the above configuration, the condition for triggering the inter-frequency measurement by the A2 event is more permissive than the trigger condition for the connection switch in mode A. Therefore, the A2 event may be triggered at an earlier time than the connection switch of mode A. The first threshold level may be specifically set as needed to properly determine the interval between the triggering of the A2 event and the triggering of the mode A connection switch.

In particular, an offset threshold may be further defined based on the A2 event for deactivation of one of the access nodes by the dual connectivity user. For example, information about the offset threshold may be broadcast to terminals from the network. Alternatively, the parameter set for the dual connection user to deactivate one of the access nodes may be broadcast from the network to the terminal with reference to the definition of the parameter for the A2 event. By the above two exemplary approaches, the reporting triggering event is specially designed for the connection transition of mode A, or the network reports the A2 event to trigger the report of the connection transition of mode A to determine the deactivation of the node This can be used to convey conditions (such as RSRP/RSRQ measurement results).

In the scenario of dual connectivity, if the existing scheme of measurement reporting is used, triggering of coverage-based measurement is required in the following aspects.

Referring back to the example shown in FIG. 2 , U1 and U3 perform dual access data transmission in an ultra-high-density small cell arrangement. Adjacent cells may use different bands to avoid strong interference between small cells. When the small cell is far away from the macro base station, when the UE switches to the overlapping area between two small cells of different frequencies to perform inter-frequency measurement, both the macro cell and the low-power node cell are the target measurement for the small cell. The conditions of the A3 to A6 event or the B1 to B2 event are satisfied, and the event is reported to the macro cell and/or the low power node, respectively. However, since the UE is still in the coverage of the macro cell, the connection to the macro cell does not need to be switched. Accordingly, a resource for unnecessarily reporting a mobility measurement comparing the serving carrier of the low-power node and the serving carrier of the macro base station is wasted.

Also, since U5 is at the edge of the macro cell, both the target macro cell M1 and the current dual access cells M2, S2 satisfy the A3/A5 event. Since U2 is at the edge of two macro cells (M3 and M2), and also at the edge of two small cells (S6 and S7), the source macro cell is an A3/A5 event for both the target macro cell and the target small cell. satisfies, the timing for triggering the mobility measurement event of the main carrier of the two access nodes of dual connectivity may be different, and the access node switching operation performed separately for different reports, signaling interaction and data transmission, This can be further complicated if each is reported at very short time intervals. Therefore, it is necessary to define a separate trigger event for each scenario and simplify the entire operation process for the user plane data transmission structure and procedure as shown in FIG. 3 as an example.

According to an embodiment, the mobility measurement device 120 performs mobility measurement on each of two access nodes, and when a predetermined condition is satisfied, a measurement target for a first node and a second node among current dual access nodes may be configured to determine the triggering of the mobility measurement report according to the comparison of the measurement result for .

Next, a method of determining triggering of a mobility measurement report according to a comparison of a measurement result for a measurement target of the current dual access node will be described with reference to a specific embodiment.

In a specific embodiment, the first measurement object for the first node measured by the mobility measurement device 120 is the inter-frequency inter-system measurement object for the first node and the connection carrier of the first node received from the first node. It may include an in-frequency measurement target for Similarly, the second measurement object for the second node measured by the mobility measurement device 120 includes the inter-frequency inter-system measurement object for the second node and the connection carrier of the second node received for the second node. It may include an in-frequency measurement target. For example, measurement targets of different access nodes may be determined according to an inter-frequency measurement/inter-system measurement list for each node.

Accordingly, the mobility measurement device 120 performs mobility measurement based on each of the first measurement object and the second measurement object, compares the measurement result of the first measurement object with the measurement result of the second measurement object, so that the measurement report condition is and determine whether the first node or the second node's carrier satisfies the measurement reporting condition to report the measurement result and/or the measurement comparison result of the measurement object. The measurement result and/or the measurement comparison result may be reported only to the node corresponding to the measurement object, only to the macro node, or to both access nodes.

In the dual connectivity scenario, the network may configure the terminal device to perform inter-frequency measurement for any access node having any carrier that satisfies the condition for reporting the A2 event. On the other hand, the intra-frequency measurement result of the carrier of the first access node may be regarded as the inter-frequency measurement result of the second access node, and the inter-frequency (inter-system or intra-system) measurement result of the first access node is the second access node. It can be regarded as the result of inter-frequency measurement of Similarly, the intra-frequency measurement result of the carrier of the second access node may be regarded as the inter-frequency measurement result of the first access node, and vice versa. In this embodiment, the measurement results are appropriately reported with reference to the mobility measurement results of both access nodes, which can avoid reporting repeated information when the measurement objects of the two access nodes include the same target node. have. Therefore, unnecessary frequent reporting of A3/A4/A5/A6/B1/B2 events can be avoided, so that the number of triggering measurement reports can be optimized in a dual connectivity scenario.

According to another specific embodiment, the mobility measurement device 120 compares the measurement result of the first node with the measurement result of the second node when the first node satisfies at least one of the following conditions, and the E-UTRAN and determine whether a triggering condition of the A3/A4/A5/B1/B2 event is satisfied.

1.1) At least one of the first node and the second node satisfies the triggering condition of the A2 event.

1.2) In the case of the first node, there is no measurement target for inter-frequency measurement or inter-system measurement.

1.3) The T310 timer started for the primary carrier of the first node exceeds the predetermined time limit, and the A3/A4/A5/B1/B2 TTT timer for the first measurement object has not yet started, or the TTT timer is started However, it is turned off within a predetermined time limit.

Here, the measurement result of the node is a mobility measurement result performed on the node, and may include a measurement result of a signal transmitted by a measurement object (eg, a first measurement object) related to the node. As described above, the measurement target of the node may be determined based on the information on the inter-frequency inter-system measurement target of the node and the information on the intra-frequency measurement target of the access carrier of the node received from the node.

With respect to condition 1.1), the comparison of the measurement result of the first node and the measurement result of the second node may be directly performed when one of the dual access nodes has a service quality lower than the threshold for the A2 event.

Regarding the condition 1.2) above, for example, when one of the dual access nodes does not have a mobility measurement list, direct measurement result comparison can be performed, so that the measurement result of the measurement target of the other node can be used.

Regarding condition 1.3) above, since the comparison of the measurement results can be directly performed when one of the dual access nodes has a high probability of link failure and there is no candidate target node, the measurement results of the measurement target of the other node can be used. .

Accordingly, comparison of measurement results between nodes may be stopped according to a predetermined condition. According to a specific embodiment, the mobility measurement device 120 may be configured to stop comparing with the measurement result of the second node and turn off the triggered corresponding A3/A4/A5/B1/B2 TTT timer, The comparison of the measurement result of the primary carrier of the first node is limited to comparison with the frequency point of the first measurement target when the first node satisfies at least one of the following conditions.

2.1) the primary carrier of the first node meets the conditions for triggering the reporting of the A1 event;

2.2) The T310 timer for the primary carrier of the first node is turned off before the T310 timer expires, or a predetermined time limit from the start of the T310 timer expires, or the TTT timer starts and the operating time of the TTT timer exceeds a predetermined limit Before exceeding, the A3/A4/A5/B1/B2 TTT timer associated with the first measurement object is started.

As for condition 2.1) above, since the service quality of the node is restored, comparison with measurement results of other nodes may be stopped.

Regarding condition 2.2) above, the comparison with the measurement results of other nodes can be stopped because the possibility of link failure of a node is small or there is a possibility that a candidate target node exists.

In particular, according to one embodiment, the mobility measurement device 120 only for frequency points included in the measurement target of the inter-frequency measurement or the inter-system measurement of each of the current dual access nodes for mobility measurement corresponding to the connection switch in mode E. By performing mobility measurement and reporting, it is configured to ensure proper handover to a secondary carrier within a node without unnecessary reporting.

In addition, while the TTT timer for a single node is started to trigger the reporting of a traditional handover event, another channel quality monitoring procedure, namely RLF monitoring, is also performed. For example, referring to FIG. 3 , the TTT timers (eg, TTT timers 1 to 4) started for individual nodes may have a different time relationship than the RLF T310 timer. Also, there may be some time dependencies between different nodes, which may help determine which measurement report corresponds to which transition mode will be triggered.

According to an embodiment, the mobility measurement device 12 satisfies a condition for a first node among current dual-connection nodes to trigger reporting of an A3/A4/A5/B1/B2 event, and a second one of the current dual-connection nodes. When the A3/A4/A5/B1/B2 TTT timer and/or T310 timer started for the node satisfy a predetermined condition, directly triggering a measurement result report and/or measurement comparison result report corresponding to a connection switch in mode C can be configured to

That is, when the first node satisfies the condition for connection switching, if the timer for the second node satisfies a predetermined condition (hereinafter, a specific condition in relation to a specific embodiment, etc.), There is no need to wait for the timer for the second node to expire in order to report the measurement result. The report may indicate that the first node satisfies a condition for transitioning to the target node and that the second node may be detached. Accordingly, the system may decide to change from the dual-connection state to the single-connection state by disconnecting from all the current dual-connection nodes and switching to the target node according to the measurement result. This configuration can reduce the complexity of reporting measurement results.

Hereinafter, an example of the predetermined condition will be described with reference to specific examples.

According to a specific embodiment, the measurement result reporting corresponding to the mode C is directly performed if the following conditions are satisfied.

3.1) the first node first satisfies the condition for triggering the reporting of the A3/A4/A5/B1/B2 event;

3.2) At this time, the expiration waiting time of the A3/A4/A5/B1/B2 TTT timer for the primary carrier of the second node is less than a predetermined threshold;

3.3) The measurement target node of the first node is the same as the measurement target node of the second node.

Here, the term "expiration waiting time" refers to the difference between the expected expiration time of a timer and the current time. That is, the shorter the expiration wait time, the closer the timer expires.

If the above condition 3.1) is satisfied, it indicates that the first node has a target node (which may be an inter-system or intra-system node) available for transition.

If the above condition 3.2) is satisfied, it indicates that the second node is more likely to have a target node available for conversion. Referring to FIG. 4 , condition 3.2) is _{satisfied when T B} -T _A ≤Δ _TTT , and the current time is the time when the TTT timer TTT _A for the first node expires (ie, the time point T _{A in} FIG. 4 ) , and the waiting time for expiration of the TTT timer TTT _B for the second node is indicated by _{T B .}

If the above condition 3.3) is satisfied, it is indicated that the connection is switched to the same target node even if the TTT timer for the second node expires.

Accordingly, if the above condition is satisfied, the measurement result report corresponding to the mode C connection switch can be directly performed without waiting for the timer of the second node to expire. Accordingly, the system may decide to disconnect from all current dual access nodes and switch to the target node according to the measurement result.

In another embodiment, the measurement result report corresponding to the mode C is directly performed, and the report indicates that the target node to switch to is the target node of the first node when the following conditions are satisfied.

4.1) the first node first satisfies the condition for triggering the reporting of the A3/A4/A5/B1/B2 event;

4.2) At this time, the expiration waiting time of the A3/A4/A5/B1/B2 TTT timer for the primary carrier of the second node is less than a predetermined threshold;

4.3) In this case, the expiration waiting time of the T310 timer for the second node is not greater than the expiration waiting time of the TTT timer by more than a predetermined threshold.

If the above condition 4.1) is satisfied, it indicates that the first node has a target node available for conversion.

If the above condition 4.2) is satisfied, it is indicated that the second node is more likely to have a target node available for conversion. Referring to FIG. 5 , the time T _{A at which the TTT timer TTT A for the first node expires.} and condition 4.2) is satisfied when the expiration waiting time T _B of the TTT timer TTT _B for the second node satisfies T _B -T _A ≤Δ _{TTT .}

If the above condition 4.3) is satisfied, even if the TTT time of the second node expires, it indicates that there is a high possibility that a link failure occurs in a time not sufficient to complete the connection switch. Referring to FIG. 5 , if T _C -T _{B ≤Δ T310,} condition 4.3) is satisfied, and the expiration waiting time of the T310 timer for the second node is indicated by _{T C .}

Accordingly, when the above condition is satisfied, the measurement result report corresponding to the mode C connection switch can be directly performed without waiting for the expiration of the TTT timer or the T310 timer for the second node. Therefore, the system may decide to disconnect from all the current dual-connection nodes and switch to the target node according to the measurement result.

In another embodiment, the measurement result report corresponding to the mode C is directly performed, and the report indicates that the target node to be switched to is the target node of the first node when the following conditions are satisfied.

5.1) the first node first satisfies the condition for triggering the reporting of the A3/A4/A5/B1/B2 event;

5.2) At this point, the expiration waiting time of the T310 timer for the second node is less than the predetermined threshold.

If the above condition 5.1) is satisfied, it indicates that the first node has a target node available for conversion.

If the above condition 5.2) is satisfied, it indicates that a link failure is likely to occur in the second node soon. Referring to FIG. 6 , if T _C -T _A ≤Δ' _T310, condition 5.2) is satisfied, and the expiration waiting time of the T310 timer for the second node is indicated by _{T C .}

Accordingly, when the above condition is satisfied, the measurement result report corresponding to the mode C connection switch can be directly performed without waiting for the expiration of the TTT timer or the T310 timer for the second node. Accordingly, the system may decide to disconnect from all of the current dual access nodes and switch to the target node of the first node according to the measurement result.

In the above specific embodiments, the thresholds Δ _TTT , Δ _T310 , Δ′ _T310 may be specifically set according to requirements. For example, the time threshold may be set with reference to the time required for performing connection switching, and may be notified to the mobility measurement device by the service carrier of the access node through a broadcast message or dedicated RRC/MAC.

An embodiment in which the measurement condition directly reports without waiting for the expiration of the timer for the second node when the measurement condition satisfies a predetermined condition has been described above. In another embodiment, the mobility measurement device 120 is configured to satisfy a condition for a first of the current dual-connection nodes to trigger the reporting of an A3/A4/A5/B1/B2 event, and a second node among the current dual-connection nodes. A3/A4/A5/B1/B2 TTT timer started for A3/A4/A5/B1/B2 and A3/A4/A5/B1/ for second node if T310 timer started for first node and/or second node meets predetermined condition may be configured to wait for expiration of the B2 TTT timer.

That is, when the first node satisfies the condition for connection switching, if the timers of the first node and the second node satisfy a certain condition (such as a condition described below with reference to a specific embodiment), the second node Wait for the timer to expire. Accordingly, the system may determine the connection switching mode based on the measurement results of both nodes. According to the present embodiment, it can be guaranteed to more appropriately determine the connection switching mode based on the measurement results of both nodes in some cases.

According to a specific embodiment, the expiration of the TTT timer for the second node is when the condition for triggering the reporting of the A3/A4/A5/B1/B2 event for the first node is satisfied, and the following condition is satisfied Wait for expiration of the TTT timer for the second node.

6.1) the expiration waiting time of the A3/A4/A5/B1/B2 TTT timer started for the primary carrier of the second node is less than a predetermined threshold;

6.2) The expiration waiting time of the T310 timer started for the first node and/or the second node is greater than the expiration waiting time of the TTT timer for the second node by a predetermined threshold or more.

If the above condition 6.1) is satisfied, it is indicated that the second node is more likely to have a target node available for conversion. For example, referring to FIG. 7 , the expiration time T _{A of the timer TTT A} for the first node and the expiration waiting time T _{B of the TTT timer TTT B} for the second node satisfy the condition T _B -T _A ≤Δ _TTT condition 6.1) is satisfied.

If the above condition 6.2) is satisfied, it is indicated that link failure will not occur soon to the first node and/or the second node. _{For example, referring to FIG. 7 , since the expiration time T C} of the T310 timer (which may be initiated for the first node and/or the second node) _{satisfies the condition T C} -TB≤Δ _TTT condition 6.2) is satisfied

In addition, if the above condition of waiting for the expiration of the TTT timer for the second node is satisfied, the TTT timer for the second node is turned off due to the fact that the channel quality of the second node is restored while waiting for the expiration of the TTT timer. In this case, the measurement result report corresponding to the mode B may be performed for the measurement triggering event of the first node.

That is, when the first node satisfies the connection switching condition, when the service quality of the second node is restored, the report indicates that the first node satisfies the condition for switching to the target mode, and the connection to the second node is maintained can indicate that it can be. Therefore, according to the measurement result, the system may decide to maintain the dual connection state by maintaining the connection to the second node among the current dual connection nodes and switching the connection to the first node to the connection to the target node of the first node. have.

In addition, when the condition of waiting for the expiration of the TTT timer for the second node is satisfied, when the TTT timer for the second node expires, the corresponding reporting scheme may be determined based on the following measurement conditions.

7.1) If the target node of the TTT event for the measurement of the primary carrier of the first node and the second node is different, the measurement result report corresponding to mode D is performed, or the target node of the macro node serving as the target node to be switched is used Thus, the measurement result report corresponding to mode C is performed.

7.2) If the target node of the TTT event for the measurement of the primary carrier of the first node and the second node is the same, a measurement result report corresponding to mode C is performed.

For case 7.1), since the two nodes have other available target nodes to switch to, the report may indicate that each of the first node and the second node satisfies the condition for switching to the respective target node. The system may decide to maintain the dual connection state by disconnecting from both the dual access nodes and switching to the two target nodes according to the measurement result. Alternatively, the system may decide to maintain a single connection state by disconnecting from all of the dual access nodes according to the measurement result and switching to the target node of the macro node.

As for case 7.2) above, since the two nodes have the same available target node to switch to, the report may indicate that both the first node and the second node satisfy the condition for switching to the same target node . Accordingly, the system may decide to change from the dual connection state to the single connection state by disconnecting from all the current dual access nodes and switching to the target node according to the measurement result.

Also, according to an embodiment, the condition of waiting for the expiration of the TTT timer for the second node may further include that the measurement trigger report event for the second node is a coverage-based mobility trigger report event. In other words, the measurement for the second node is a coverage-based mobility measurement waiting for the expiration of the TTT timer for the second node after expiration of the TTT timer for the first node, and the measurement of the first node is a coverage-based mobility measurement or a load-based measurement It may be a measure of mobility. With this configuration, the reporting of the coverage-based measurement is prevented from waiting for the report of the load-based measurement, and thus a reasonable mobility measurement reporting method is obtained.

In addition to the measurement conditions described with reference to the above-described embodiments, there may be other conditions in which all of the dual access nodes satisfy the condition for triggering the report. According to an embodiment, the mobility measurement device 120 establishes a connection to two nodes when the main carriers of both current dual-connection nodes satisfy a condition for triggering the reporting of an A3/A4/A5/B1/B2 event. Instead of switching, it may be configured to perform a measurement result report corresponding to mode B according to priority, or to perform a measurement result report corresponding to mode D to determine a preferred switching node by the network. In other words, the report may indicate that one of the nodes satisfies the condition for transitioning to the target node, and the connection to the other node may be maintained. Accordingly, the system may decide to maintain the dual connection state by maintaining the connection to any one of the current dual connection nodes and switching the connection to the other node to the target node according to the measurement result. In the case of another node, the measurement result of the other node may be reported after receiving a node switching command from the network or after a certain period of time. This configuration is useful for reducing the complexity of measurement reporting.

Specifically, the priority may be determined according to one or more of the following principles.

8.1) having a worse channel quality of the source node takes precedence;

8.2) having a better signal of the target node takes precedence;

8.3) Coverage-based measurement events take precedence over load-based measurement events;

8.4) the node whose T310 timer expires earlier takes precedence; and

8.5) Macro nodes take precedence over low-power nodes.

According to principles 8.1) and 8.2), the switching mode is selected according to the channel quality, which can achieve better channel quality by node switching. According to the principles of 8.3) and 8.5), it is guaranteed that more important nodes have higher switching priority. According to principle 8.4), it is guaranteed that the node that is more likely to cause a link failure will have a higher switching priority. With this configuration, the reporting can be performed according to the channel quality or the importance of the node, and thus has a more reasonable mobility measurement reporting scheme.

In addition, considering that the macro node is mainly for maintaining network connection, and the low-power node is a node mainly for data distribution, it can mainly perform load-based measurement reporting for the low-power node, and coverage-based measurement for both nodes It is desirable to be able to carry out a report.

Thus, according to one embodiment, the mobility measurement device 120 is configured to report load based events only for low power nodes.

In particular, when the measurement reports corresponding to connection switching mode C and connection switching mode D (i.e., disconnecting from both dual connection nodes and switching connections to one or more target nodes) occur in various time relationship combinations, the mobility measurement device ( 120) may be configured to report a new report triggering event or combine traditional A3/A4/A5/B1/B2 events. Additionally, the mobility measurement device 120 may report in a variety of ways. For example, the measurement result of the access node is reported to each access node (that is, the measurement result of the first node is reported to the first node and the measurement result of the second node is reported to the second node), or the measurement result of all access nodes is reported to the second node. The measurement result may be reported to both access nodes (that is, the measurement result of the first node and the second node may be reported to both the first node and the second node). In addition, as described with reference to FIGS. 8 to 11 below, the measurement results of the main carriers of the low-power node are reported to the low-power node while reporting the measurement results of both nodes only to the macro node or reporting the measurement results of both nodes to the macro node. It is possible to report

According to an embodiment, the mobility measurement device 120 is configured to, before receiving the node switch notification, for a predetermined time limit when a radio link failure occurs in one of the current dual access nodes and a node switch event reporting is performed for that node. After waiting, it is configured to report to the network through another node among the current dual access nodes, and wait for switching notification signaling transmitted from the network through the other node within a time limit. Alternatively, the reporting may be done directly to the other node, and the node switching operation is based on notification from the other node.

In addition, the node reporting the measurement result and receiving the confirmation of the connection change may be determined according to the state of the T310 timer or the TTT timer started for the access node.

According to an embodiment, the mobility measurement device 120 transmits the measurement report through the first and/or second of the current dual access nodes in the following cases and receives the confirmation of the connection switch, ie, the measurement report and receive an acknowledgment of connection transition via either or both nodes.

9.1) the expiration waiting times of the T310 timer for the first node and the second node are both greater than a predetermined threshold;

9.2) For the first node and the second node, the expiration waiting time of the T310 timer is greater than the expiration waiting time of the TTT timer by a predetermined threshold or more.

As mentioned above, the expiration waiting time is the difference between the current time and the expected expiration time of the timer. Hereinafter, the current time is the expiration time of the TTT timer for the first node, T310 _A indicates the expiration waiting time of the T310 timer for the first node, T310 _B indicates the expiration waiting time of the T310 timer for the second node, , TTT _B is assumed to indicate the expiration waiting time of the TTT timer for the second node.

If the condition of case 9.1) is satisfied, that is, if T310 _A ≥ ΔA and T310 _B ≥ ΔB, it is indicated that no link failure will occur soon in either of the two access nodes. Accordingly, the transmission of the measurement report and the reception of the confirmation of the connection switch may be performed by either or both of the access nodes.

If condition 9.2) is satisfied, i.e., if T310 _A -TTT _B ≥Δ'A and T310 _B -TTT _B ≥Δ'B, there may be sufficient time between the determination of the target node available for switching and the occurrence of link failure. indicate that there is Accordingly, the transmission of the measurement report and the reception of the confirmation of the connection switch may be performed by either or both of the access nodes.

In another embodiment, the mobility measurement device 120 may be configured to send a measurement report through a first of the current dual access nodes and receive a confirmation for a connection switch in the following cases.

10.1) the expiration waiting time of the T310 timer for the first node is greater than the predetermined threshold, and the expiration waiting time of the T310 timer for the second node among the current dual access nodes is less than the predetermined threshold;

10.2) For the first node, the expiration waiting time of the T310 timer is greater than the expiration waiting time of the TTT timer by a predetermined threshold or more, and for the second node, the expiration waiting time of the T310 is not greater than the timer of the TTT timer by a predetermined threshold or more .

If the condition of case 10.1) is satisfied, that is, if T310 _A ≥ _{Δ A} and T310 _B < Δ _B , it is indicated that a link failure will not occur soon at the first node, but a link failure is likely to occur soon at the second node. Accordingly, the transmission of the measurement report and the reception of the confirmation of the connection switch may be performed by the first node.

If the condition of case 10.2) is satisfied, that is, if T310 _A -TTT _B ≥Δ' _A and T310 _B -TTT _B <Δ' _B, then between the determination of the available switching target node and the occurrence of link failure to the first node While there may be sufficient time, it is indicated that there may not be sufficient time between the determination of the available switching target node and the occurrence of a link failure to the second node. Accordingly, the transmission of the measurement report and the reception of the confirmation of the connection switch may be performed by the first node.

Similarly, the mobility measurement device 120 may be configured to send a measurement report through a second one of the current dual access nodes and receive a confirmation of the connection switch in the following cases.

11.1) the expiration waiting time of the T310 timer for the second node is greater than a predetermined threshold, and the expiration waiting time of the T310 timer for the first node of the current dual access node is less than the predetermined threshold;

11.2) For the second node, the expiration waiting time of the T310 timer is greater than the expiration waiting time of the TTT timer by a predetermined threshold or more, and for the first node, the expiration waiting time timer of the T310 is not greater than the timer of the TTT timer by a predetermined threshold or more .

In another embodiment, the mobility measurement device 120 may be configured to send a measurement report or receive a confirmation of a connection switch through both the first and second nodes of the current dual access node in the following cases.

12.1) the expiration waiting times of the T310 timers of the first node and the second node are both less than a predetermined threshold;

12.2) For the first node and the second node, the expiration waiting time of the T310 timer is not greater than the expiration waiting time of the TTT timer by more than a predetermined threshold.

If the condition of case 12.1) is satisfied, that is, if T310 _A < Δ _A and T310 _B < Δ _B , it is indicated that a connection failure may occur in both access nodes soon. Therefore, in order to improve the probability of success of signaling transmission, the transmission of the measurement report and the reception of the confirmation of the connection switch need to be performed by both nodes.

If the condition of case 12.2) is satisfied, that is, if T310 _A -TTT _B <Δ' _A and T310 _B -TTT _B ≥Δ' _B , there may not be sufficient time between the determination of the available switching target node and the occurrence of link failure. It is indicated that there is Therefore, in order to improve the probability of success of signaling transmission, transmission of a measurement report and reception of confirmation of connection switch need to be performed by both nodes.

In the above embodiments, _{time thresholds such as thresholds Δ A} , Δ _B , Δ' _A , Δ' _B may be set according to actual conditions. For example, in order to guarantee a predetermined success probability in signaling transmission, a time threshold may be set by referring to the time required to perform a connection switch. The threshold is notified to the mobility measurement device by the serving carrier of the access node via a broadcast message or dedicated RRC/MAC.

Scenarios can be reported individually or can be reported as a kind of scenario that can be treated in the same principle (4 cases classified as above, etc.). In particular, when instances are represented by a 0/1 bitmap, the number of additional information bits is the number of instances. If the side information bits are expressed in binary, the side information is 4 bits or 2 bits. Accordingly, the network can perform process control according to the time sequence corresponding to the case.

Next, an exemplary signaling transmission for switching access nodes is described with reference to FIGS. 8 to 11 . 8 and 9 correspond to the connection switching mode C (that is, the mode in which the connection is cut off from both dual connection nodes and the connection is switched to one target node). 10 and 11 correspond to connection switching mode D (ie, a mode in which a connection is cut from both dual connection nodes and a connection is switched to two target nodes).

Referring to FIG. 8 , the UE may send a measurement report to the macro node based on the result of channel state monitoring. Also, referring to the conditions (eg, 9.1) or 9.2), 12.1) or 12.2), the UE may send a measurement report to the secondary node. In addition, the macro node may transmit the received measurement report to the secondary node.

Then, a node switch request may be sent to the target node by the macro node and/or the secondary node. If the request is granted, the target node sends an accept signaling to the macro node and/or the secondary node, which in turn sends a confirmation of node switching to the UE.

Referring to FIG. 9, for example, referring to conditions (eg, 10.1) or 10.2), 11.1) or 11.2), the UE may transmit a measurement report only to the macro node based on the result of channel state monitoring. have.

Then, the node switch request may be sent by the macro node to the target node. If the request is approved, the target node sends an accept signaling to the macro node, and the macro node sends a confirmation of node switching to the UE.

Note that although Figure 9 shows the measurement report and confirmation of node switching as being sent by the macro node, the measurement report and confirmation of node switching may also be sent by the secondary node if the secondary node satisfies the corresponding condition Should be.

Referring to FIG. 10, referring to conditions (eg, 10.1) or 10.2), 11.1) or 11.2), the UE may send a measurement report to the source macro node based on the result of channel state monitoring.

Then, a node switch request may be sent by the source macro node to the target macro node and the target auxiliary node. If the request is approved, the target macro node and the target auxiliary node send an accept signaling to the source macro node, which in turn sends a confirmation of node switching to the UE.

10 shows the measurement report and confirmation of node transition as being sent by the source macro node, the measurement report and confirmation of node transition may also be sent by the source secondary node if the source secondary node satisfies the corresponding condition. .

Referring to FIG. 11 , for example, referring to conditions (eg, 9.1) or 9.2), 12.1) or 12.2), the UE sends the source macro node and the source secondary node based on the result of the channel state monitoring. Measurement reports can be sent.

Then, a node switching request may be sent to the target macro node and the target auxiliary node by the source macro node and the source auxiliary node. If the request is approved, the target macro node and the target auxiliary node send an accept signaling to the source macro node and the source auxiliary node, and the source macro node and the source auxiliary node send a confirmation of node switching to the UE.

Obviously, the above description of embodiments of electronic devices also discloses some processes and methods. Without repeating some of the details described above, a summary of the method is provided below.

12 , a method for performing mobility measurement by a mobile communication terminal according to an embodiment of the present disclosure includes:

When the quality of service of at least one node among the current dual access nodes for the mobile communication terminal communicating in the dual connectivity scenario is lower than the predetermined level (Y in S1210), the mobility for the current dual access node to determine the access switching mode performing a measurement (S1220); and

Determining a mode for reporting the result of the mobility measurement based on the measurement condition of at least one node among the current dual access nodes (S1230)

includes

The connection switching mode may include at least one of the aforementioned connection switching modes A to E.

According to an embodiment, when the quality of service of one of the current dual access nodes is lower than the first threshold level, the mobility measurement result corresponding to the mode A access switch is reported. The first threshold level is lower than the threshold level for triggering the E-UTRAN A2 event.

In another embodiment, the triggering of the mobility measurement report is determined according to a comparison between measurement results for a first access node and a second access node among the current dual access nodes when a predetermined condition is met.

Specifically, the first measurement object for the first node may include an inter-frequency inter-system measurement object for the first node and an intra-frequency measurement object for the access carrier of the first node received from the first node, The second measurement object for the second node may include an inter-frequency inter-system measurement object for the second node and an intra-frequency measurement object for a connection carrier of the second node received for the second node.

The mobility measurement may be performed for each of the first measurement object and the second measurement object, and the measurement report condition is satisfied by comparing the measurement result of the measurement object for the first node with the measurement result of the measurement object for the second node. can be decided When the condition for reporting the measurement result to the first node is satisfied, the measurement result for the measurement target of the second node is reported to the first node.

In addition, when the first node satisfies at least one of the following conditions, the measurement result of the first node and the measurement result of the second node are compared to trigger the E-UTRAN A3/A4/A5/B1/B2 event It may be determined whether a condition is satisfied: at least one of the first node and the second node satisfies the triggering condition of the A2 event; In the case of the first node, there is no measurement target for inter-frequency measurement or inter-system measurement; The T310 timer started for the primary carrier of the first node exceeds the predetermined time limit, and the A3/A4/A5/B1/B2 TTT timer for the first measurement object has not yet started, or the TTT timer has been started but Turns off within a set time limit.

Further, when the first node satisfies at least one of the following conditions, comparison with the measurement result of the second node may be stopped, and the triggered corresponding A3/A4/A5/B1/B2 TTT timer is turned off and the comparison of the measurement result of the primary carrier of the first node may be limited to comparison with the frequency point of the first measurement object: the primary carrier of the first node meets a condition for triggering the reporting of the A1 event let; The T310 timer for the primary carrier of the first node is turned off before expiration of the T310 timer, or the associated A3/A4/A5/B1/B2 TTT timer is started before the lapse of a predetermined time limit from the start of the T310 timer, or the TTT timer has been started, and the operating time of the TTT timer exceeds a predetermined limit.

According to an embodiment, for the mobility measurement corresponding to the mode E access change, the mobility measurement and report are performed only for a frequency point included in the measurement target of the current dual access node's inter-frequency measurement or inter-system measurement.

In another embodiment, the mobile terminal satisfies the condition for the first node among the current dual access nodes to trigger the reporting of the A3/A4/A5/B1/B2 event, and the A3 started for the second node among the current dual access nodes. /A4/A5/B1/B2 When the TTT timer and/or the T310 timer satisfy a predetermined condition, the measurement result report corresponding to the mode C is directly performed.

Specifically, the measurement result report corresponding to the mode C is performed under the following conditions: the first node first meets the condition for triggering the reporting of the A3/A4/A5/B1/B2 event; Meanwhile, the expiration waiting time of the A3/A4/A5/B1/B2 TTT timer for the primary carrier of the second node is less than the predetermined threshold; It may be directly performed when the same condition as the measurement target node of the first node is satisfied as the measurement target node of the second node.

In addition, the following condition: the first node first meets the condition for triggering the reporting of the A3/A4/A5/B1/B2 event; Meanwhile, the expiration waiting time of the A3/A4/A5/B1/B2 TTT timer for the primary carrier of the second node is less than the predetermined threshold; On the other hand, when the condition that the expiration waiting time of the T310 timer for the second node is not greater than the predetermined threshold or more than the expiration waiting time of the TTT timer is satisfied, the measurement result report corresponding to mode C can be directly performed, and the switch It is indicated that the target node to be performed is the target node of the first node.

In addition, the following condition: the first node first meets the condition for triggering the reporting of the A3/A4/A5/B1/B2 event; Meanwhile, the expiration waiting time of the A3/A4/A5/B1/B2 TTT timer for the primary carrier of the second node is greater than the predetermined threshold; On the other hand, when the condition that the expiration waiting time of the T310 timer for the second node is less than the predetermined threshold is satisfied, the measurement result report corresponding to the mode C may be directly performed, and the target node to switch to is the first node It is indicated that it is a target node of

According to an embodiment, the mobile communication terminal satisfies the condition for the first node among the current dual access nodes to trigger the reporting of the A3/A4/A5/B1/B2 event, and for the second node among the current dual access nodes, A3/A4/A5/B1/ for the second node if the A3/A4/A5/B1/B2 TTT timer started and the T310 timer started for the first node and/or the second node meet a predetermined condition Wait for expiration of B2 TTT timer.

More specifically, the condition for triggering the reporting of the A3/A4/A5/B1/B2 event is met for the first node, and the following condition: A3/A4/A5/B1 initiated for the primary carrier of the second node /B2 TTT timer expiration waiting time is less than a predetermined threshold; TTT timer for the second node when the condition that the expiration waiting time of the T310 timer started for the first node and/or the second node is greater than the expiration waiting time of the TTT timer for the second node by more than a predetermined threshold is met can wait for the expiration of

More specifically, when the TTT timer for the second node is turned off as the channel quality of the second node is recovered while waiting for the expiration of the TTT timer, the measurement corresponding to the mode B for the measurement triggering event of the first node Results reporting is performed.

In addition, when the TTT timer for the second node expires, when the target node of the TTT event for the measurement of the primary carrier of the first node and the second node is different, report the measurement result corresponding to the mode D; When the target node of the TTT event for the measurement of the primary carrier of the first node and the second node is the same, a measurement result report corresponding to mode C is performed.

In addition, the condition for waiting for the expiration of the TTT timer for the second node may also include that the measurement trigger reporting event for the second node is a coverage-based mobility trigger reporting event.

In another embodiment, if the primary carrier of both the current dual access node meets the condition for triggering the reporting of the A3/A4/A5/B1/B2 event, the following principle: having worse channel quality of the source node priority; Having a better signal of the target node takes precedence; Coverage-based measurement events take precedence over load-based measurement events; The node whose T310 timer expires earlier takes precedence; and a macro node may determine a priority for reporting based on one or more of priority over a low-power node.

Preferably, it is possible to report load based events only for low power nodes.

According to one embodiment, if a radio link failure occurs in one of the current dual access nodes before receiving the node switching notification, the following rule: wait for a predetermined time limit and then network through the other one of the current dual access nodes a rule to report to and wait for switching notification signaling sent from the network through another node within a time limit; and a rule of reporting directly to the other node and performing a node switching operation based on a notification from the other node.

In another embodiment, the expiration waiting time of the T310 timer for the first node and the second node among the current dual access nodes are both greater than a predetermined threshold; For the first node and the second node, when the expiration waiting time of the T310 timer is greater than or equal to a predetermined threshold than the expiration waiting time of the TTT timer, transmission and connection switching of the measurement report through the first node and/or the second node acknowledgment is received.

In another embodiment, the expiration waiting time of the T310 timer for the first node is greater than the predetermined threshold, and the expiration waiting time of the T310 timer for the second node among the current dual access nodes is less than the predetermined threshold; For the first node, the expiration waiting time of the T310 timer is greater than the expiration waiting time of the TTT timer by a predetermined threshold or more, and for the second node, the expiration waiting time of the T310 timer is greater than the expiration waiting time of the TTT timer by a predetermined threshold or more In a not-so-great case, transmission of a measurement report and receipt of confirmation of connection switching are performed through the first node among the current dual-connection nodes.

In another embodiment, the expiration waiting times of the T310 timers of the first node and the second node among the current dual access nodes are both less than a predetermined threshold; For the first node and the second node, when the expiration waiting time of the T310 timer is not greater than the expiration waiting time of the TTT timer by more than a predetermined threshold, transmission of the measurement report and connection switching through both the first node and the second node acknowledgment is received.

By way of example, the various steps of the method and the various components and/or units of the device may be implemented in software, firmware, hardware, or a combination thereof. When implemented in software or firmware, the software program for implementing the method may be installed in a computer (such as the general-purpose computer 1300 shown in FIG. 13 ) having a dedicated hardware structure from a storage medium or a network. A computer can perform various functions when various programs are installed. When the device is implemented in software, the device may be configured by software design. When the device is implemented in hardware, the device may be configured by hardware design or combination. When the device is implemented by a combination of software and hardware, the device may be configured by a design that combines software and hardware.

In FIG. 13 , the calculation processing unit (ie, CPU) 1301 performs various functions according to a program stored in a read only memory (ROM) 1302 or a program loaded in a random access memory (RAM) 1303 from the storage unit 1308 . Execute processing. The RAM 1303 also stores data required by the CPU 1301 to execute various processes and the like as necessary. The CPU 1301 , ROM 1302 , and RAM 1303 are linked to each other via a bus 1304 . Also linked to the bus 1304 is an input/output interface 1305 .

The following components: an input unit 1306 including a keyboard and mouse, a display such as a cathode ray tube (CRT) and a liquid crystal display (LCD), an output unit 1307 including a speaker, and storage of a hard disk A unit 1308 and a communication unit 1309 such as a network interface card such as a LAN card, a modem, etc. are linked to the input/output interface 1305 . The communication unit 1309 performs communication processing through a network such as the Internet. Drive 1310 may also be linked to input/output interface 1305 if desired. A removable medium 1311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is installed on the drive 1310 as necessary, and thus a computer program read therefrom is installed in the storage 1308 as necessary. .

When the above series of processing is implemented in software, a program constituting the software is installed from a network such as the Internet or a storage medium such as a removable medium 1311 .

It will be understood by those skilled in the art that the storage medium is not limited to the removable medium 1311 shown in FIG. 13 in which the program is stored and distributed separately from the device for providing the program to a user. Examples of the removable medium 1311 include magnetic disks including floppy disks (registered trademark), optical disks such as CD-ROM (Compact Disk Read Only Memory) and DVD (Digital Versatile Disc), MiniDisc (MD) (registered trademark) It includes a magneto-optical disk and a semiconductor memory comprising a. Alternatively, the storage medium may be a ROM 1302 in which a program is stored and distributed to a user together with a device including the storage medium, a hard disk included in the storage 1308, or the like.

Embodiments of the present disclosure also relate to program products in which machine readable instruction code is stored. The instruction code, when read and executed by a machine, may perform the method according to the above embodiment.

Accordingly, the present disclosure also includes a storage medium carrying a program product having machine readable instruction code stored thereon. Storage media include, but are not limited to, soft disks, optical disks, magnetic disks, storage cards, storage sticks, and the like.

Embodiments of the present disclosure also include electronic devices. Electronic devices include circuits. The circuit is configured to perform mobility measurement for the current dual access node to determine a connection switching mode when the quality of service of at least one of the current dual access nodes of the mobile communication terminal communicating in the dual connectivity scenario is lower than a predetermined level . The circuitry is also configured to determine a mode for reporting a result of the mobility measurement based on a measurement condition of at least one of the current dual access nodes.

In the foregoing description of embodiments of the present disclosure, features described and/or illustrated in one embodiment may be applied to, combined with, or combined with features of other embodiments, in one or more other embodiments in the same or similar manner. can be replaced

It should be emphasized that the term "comprising/having" as used in this disclosure refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components. .

In the above examples and embodiments, numerical reference signs are used to indicate various steps and/or units. Those skilled in the art should understand that reference signs are used merely to facilitate description and illustration, rather than to indicate order or other limitations.

Further, the methods of the present disclosure are not limited to being performed in a chronological order as described, but may be performed in other temporal sequences or in parallel or independently. Accordingly, the execution order of the methods described in the present disclosure is not a limitation on the technical scope of the present disclosure.

Although the present invention has been disclosed by describing the above embodiments of the present disclosure, it should be noted that each of the above examples and embodiments is for illustrative purposes rather than limiting ones. Those skilled in the art can make various modifications, improvements and equivalents within the spirit and scope of the appended claims. Modifications, improvements and equivalents should also fall within the protection scope of the present disclosure.

Claims (20)

An electronic device for a wireless communication system, comprising:
a communication device configured to perform dual connectivity communication with two access nodes each over a different carrier; and
if the quality of service of at least one of the current dual connectivity nodes is lower than the predetermined level, perform mobility measurement on the access node of the current dual connectivity to determine a connectivity switching mode;
a mobility measurement device, configured to determine a situation for reporting a result of the mobility measurement based on a measurement condition of a second one of the current dual access nodes
including,
The mobility measuring device is configured to, without waiting for the timer for the second node to expire, when a waiting time for expiration of the timer for the second node from the time when the timer for the first node expires is less than or equal to a predetermined threshold The electronic device is configured to send a measurement report to a first node and receive a confirmation of a connection transition from the first node. delete According to claim 1,
The electronic device, wherein the mobility measurement comprises a mobility measurement configured to disconnect from one of the current dual-connection nodes to change from a dual-connection state to a single-connection state. According to claim 1,
wherein the mobility measurement comprises a mobility measurement configured to maintain a dual connection state by maintaining a connection to one of the current dual access nodes and switching a connection to the other node to a target node. According to claim 1,
The mobility measurement device is configured to, if a radio link failure occurs in one of the current dual access nodes before receiving the node switching notification, the following rules:
a rule to report to a network through another node of the current dual access node after waiting for a predetermined time limit, and wait for a switch notification signaling transmitted from the network through the other node within the time limit; and
A rule for reporting directly to the other node and performing a node switching operation based on a notification from the other node
An electronic device configured to operate according to one of the A method for performing mobility measurement by a mobile communication terminal, comprising:
performing mobility measurement on the current dual access node to determine a connection switching mode when the quality of service of the second node for the mobile communication terminal communicating in the dual connectivity scenario is lower than a predetermined level; and
determining a situation for reporting the result of the mobility measurement based on a measurement condition of a second node among the current dual access nodes
including,
The determining of the situation may include, if a waiting time for expiration of the timer for the second node from the time when the timer for the first node expires is less than or equal to a predetermined threshold, without waiting for the expiration of the timer for the second node sending a measurement report to the first node and receiving an acknowledgment of the connection transition from the first node. delete 7. The method of claim 6,
The connection switching mode is the following connection switching mode:
Mode A: a mode of changing from a dual connection state to a single connection state by disconnecting from one of the current dual connection nodes;
Mode B: A mode in which a connection to one of the current dual access nodes is maintained, and a connection to another node is switched to a target node to maintain a dual connectivity state
A method comprising one of. 7. The method of claim 6,
If a radio link failure occurs in one of the current dual access nodes before receiving the node switch notification, the following rules:
a rule to report to a network through another node of the current dual access node after waiting for a predetermined time limit, and wait for a switch notification signaling transmitted from the network through the other node within the time limit; and
A rule for reporting directly to the other node and performing a node switching operation based on a notification from the other node
The method further comprising operating according to one of the An electronic device in a wireless communication system, comprising:
communicate with the first node and the second node over different carriers for dual connectivity;
detect a radio link failure on a primary carrier of the second node;
circuitry configured to generate, to the first node, a report indicative of the radio link failure
including,
The circuit is
When the expiration waiting time of the timer for the second node from the time when the timer for the first node expires is less than or equal to a predetermined threshold, the measurement report to the first node without waiting for the expiration of the timer for the second node and receive an acknowledgment of a connection transition from the first node. delete 11. The method of claim 10,
The circuit is
perform mobility measurement on the measurement target of the electronic device;
and include a mobility measurement result in the report to the first node. 11. The method of claim 10,
The electronic device is configured to report a mobility measurement result when a quality of service of a primary carrier of a second node is lower than a first threshold level, wherein the first threshold level is a threshold level for triggering an E-UTRAN A2 event No higher, electronic device. 11. The method of claim 10,
and the circuitry is further configured to receive, from the first node, signaling indicating release of the second node when the report indicates the radio link failure. 11. The method of claim 10,
and the circuitry is further configured to receive, from the first node, signaling indicating a change in the second node when the report indicates the radio link failure. 11. The method of claim 10,
The electronic device is an electronic device corresponding to user equipment. A method for an electronic device in a wireless communication system, comprising:
communicating with the first node and the second node over different carriers for dual connectivity;
detecting a radio link failure on a primary carrier of the second node; and
generating, for the first node, a report indicating the radio link failure;
including,
The generating of the report may include: when a waiting time for expiration of a timer for the second node from a time when the timer for the first node expires is less than or equal to a predetermined threshold, waiting for expiration of the timer for the second node and sending a measurement report to the first node and receiving confirmation of the connection transition from the first node. delete A non-transitory computer-readable storage medium comprising executable instructions, comprising:
the executable instructions, when executed by the information processing machine, cause the information processing machine to perform a method for user equipment, the method comprising:
communicating with the first node and the second node over different carriers for dual connectivity;
detecting a radio link failure on a primary carrier of the second node; and
generating, for the first node, a report indicating the radio link failure;
including,
The generating of the report may include: when a waiting time for expiration of a timer for the second node from a time when the timer for the first node expires is less than or equal to a predetermined threshold, waiting for expiration of the timer for the second node and sending a measurement report to the first node and receiving an acknowledgment of the connection transition from the first node. delete

Images